Patents by Inventor Yoichiu Kawakami

Yoichiu Kawakami has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Light-Emitting Device
    Publication number: 20070194693
    Abstract: Disclosed is a light-emitting device comprising a semiconductor excitation light source emitting blue-violet light and a solid material illuminant having an absorbent for the blue-violet light containing samarium (Sm). With such a constitution, the light-emitting device has high efficiency, long life and excellent color rendering properties.
    Type: Application
    Filed: March 22, 2005
    Publication date: August 23, 2007
    Inventors: Hajime Saito, Mototaka Taneya, Takayuki Yuasa, Tatsuya Ryowa, Setsuhisa Tanabe, Yoichiu Kawakami, Shizuo Fujita, Mitsuru Funato